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无机材料学报

无机材料学报

• 研究论文 • 上一篇    

可控尺寸和形貌的多钼酸聚集体和 MoO3粉体的制备

管自生, 张玉, 卢延军   

  1. 南京工业大学材料科学与工程学院, 南京 210009
  • 收稿日期:2007-05-15 修回日期:2007-07-03 出版日期:2008-05-20 网络出版日期:2008-05-20

Preparation of Molybdic Acid Aggregates and Molybdenum Trioxide Powder with Controllable Size and Morphology

GUAN Zi-Sheng, ZHANG Yu, LU Yan-Jun   

  1. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
  • Received:2007-05-15 Revised:2007-07-03 Published:2008-05-20 Online:2008-05-20

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摘要： 钼酸铵在醋酸和十六烷基三甲基溴化铵(CTAB)调节下分别与硝酸和盐酸反应制备了多钼酸聚集体. 结果表明, 钼酸铵的浓度、醋酸和CTAB对多钼酸聚集体及其烧结后形成MoO3粉体的形貌和尺寸有影响. 较高浓度的钼酸铵分别在醋酸和CTAB调节下与硝酸反应均可制备直径为1~2μm, 长为数十微米的细长晶须, 经过500~600℃烧结后则相应变为纳米级片状和颗粒状α-MoO3粉体; 低浓度的钼酸铵在CTAB调节下与盐酸反应可制备不规则的晶体棒, 经过烧结后得到颗粒状α-MoO3粉体.

关键词: 多钼酸, 聚集体, MoO3, 醋酸, 十六烷基三甲基溴化铵

Abstract: Molybdic acid aggregates were prepared by the reaction of ammonium molybdate with HNO3 and HCl in a coexisting HAc or cetyl-trimethyl ammonium bromide (CTAB) solution, respectively. The results indicate that the size and morphology of as-prepared molybdic acid aggregates and annealed products-α-MoO3 powder were affected by the concentration of ammonium molybdate, HAc and CTAB. The molybdic acid aggregates with diameter of 1--2μm and length of several decades-micron can be obtained by the reaction of higher-concentration ammonium molybdate with HNO3 in a coexisting HAc or CTAB solution, repectively. After the as-prepared molybdic acid aggregates are annealed at 500--600℃ for 3h, the nanometer-scaled lamellate and sub-micrometer MoO3 powder are prepared. In addition, irregular molybdic acid aggregates rods are achieved by the reaction of lower-concentration ammonium molybdate with HCl in a coexisting CTAB solution.

Key words: molybdic acid, aggregates, MoO3, HAc, cetyl-trimethyl ammonium bromide

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